116 NATURE-STUDY REVIEW [14:3— Mar., 1918 



from insect pests. They remain symmetrical long after the rapidly 

 growing trees are ragged and unsightly. 



ii. Repeated: What would be your recommendation for 

 this lot, slow or rapid growers? 



Conclusion: A combination of slow and rapid growers is best. 

 They can be arranged so that the rapid growers can be removed 

 early leaving the slow growers to furnish permanent shade. 



i2. Which of the fast growing trees shall we select? 



13. Which of the slow growers shall we select? 



1 . Repeated : Which of the common shade trees shall he plant ? 

 From data already gathered the children will probably come 



to the following conclusions: 



A combination of hard and soft maple so arranged that the 

 soft maples can be removed as soon as damaged, will make a 

 valuable lot. 



If the parasites succeed in conquering the catalpa sphinx the 

 catalpa would probably be more valuable than the soft maple 

 because it will furnish shade quicker. 



The ash is also a valuable tree. 



Aside from the danger from insect pests the elm and linden are 

 most valuable for permanent shade. 



2 . Suppose the owner decides to plant the hard maple and the 

 catalpa speciosa how shall he do it? 



1. How select the trees ? Ref. 7, p. 102. 



Ref. 10, p. 5. 



Ref. 11, pp. 82-84, 87. 



1. Where shall he get the trees? 



From the woods or the nursery ? 

 From what nursery? 



2 . What kind of trees shall he select ? 



What age? 

 What size? 

 What kind of top and roots shall the trees have ? 



2. When plant the trees? Ref. 7, pp. 106-107. 



Ref. 10, p. 5. 



3. How have in good shape for planting? 



Ref. 7, pp. 102-104. 

 Ref. 10, pp. 5-6, 8-9. 



